WO2009003332A1

WO2009003332A1 - Wire rope space anti-interference arrangement for crane with multiple hoisting points

Info

Publication number: WO2009003332A1
Application number: PCT/CN2007/003426
Authority: WO
Inventors: Weiyue Li; Min Gu; Changhai Yin
Original assignee: Dalian Huarui Co., Ltd.
Priority date: 2007-06-29
Filing date: 2007-12-03
Publication date: 2009-01-08
Also published as: KR101115837B1; KR20100023973A; RU2441833C2; JP5426541B2; RU2010102937A; JP2010531794A

Abstract

A wire rope space anti-interference arrangement for a crane with multiple hoisting points is disclosed. The hoister comprises a main girder (10), a movable pulley block (3), a fixed pulley block (5) and a hoister (1). Leading pulleys (2) are provided in the upper space of the upper cover board of the main girder (10). Hoister steadiers (7) with different height are provided at two ends of the cover board. Corresponding to the height of the hoister steadiers (7), the leading pulleys (2) are mounted at different height. Connecting lines are located between the vertical center lines of the hoister winding drums provided at two ends of the main girder (10) and the center lines of the respectively corresponding leading pulleys (2) of the hoister winding drums. A same small fleet anger (α) is formed between the connecting lines and the center line of the main girder (10), corresponding to the fleet anger between the hoister (1) at the same end and the main girder (10). The two fleet angers between the hoisters (1) at two ends and the main girder (10) are opposite. The anti-interference arrangement is simple, its manufacture, installation and maintain is handy, its operation is of highperformance, safe and reliable. The arrangement is applied to the crane for hoisting the superheavy article such as drilling platform and so on.

Description

Multi-hanging crane hoisting wire rope space anti-interference arrangement

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a hoisting machine, and more particularly to a multi-hanging crane for hoisting a subsea docking of an offshore drilling platform, and a space anti-interference arrangement for a multi-winding system on other similar cranes. Background technique

The offshore docking platform is designed to meet the demanding requirements of multi-hanging cranes. The lifting capacity should be too large (up to 20,000 tons for combined lifting), the lifting height should be super high (up to 103m), and the main beam span is large ( The span is 125m); the crane with super-lifting weight increases the lifting height and reduces the high construction cost caused by the high-grade (C50 grade) concrete support. The main beam is required to use the lower flange plate horizontally and the upper cover plate is high. Low main beam structure on both sides, and the width of the beam is small; due to the excessive weight, it is necessary to use a multi-winding system (two sets per set or two sets of hoisting systems at each end) to hoist at the same time.

However, the number of conventional crane hoisting mechanisms and winding systems is small, generally 1 to 2 sets, and the arrangement is not staggered, and only a plane arrangement can be realized, but the lifting of the overweight can not be completed on the platform; The lifting crane is used to realize the lifting, and the multiple lifting mechanism and the wire rope winding system are arranged in the narrow width of the main beam, and the general arrangement type cannot be realized at all. Multi-hedge cranes are usually used for lifting large loads. The height of the main beam is large, and the width between the webs of the main girder is small. The space arrangement of multiple sets of independent hoisting systems is easy to cause between the ropes and between the ropes and the main beam. Interference with each other; Studying the space anti-interference arrangement scheme of the multi-hanging crane hoisting wire rope winding system is a key issue to be solved urgently. Summary of the invention

The object of the present invention is to solve the above problems, placing multiple sets of winches on the upper part of the main beam, by using different winch support heights and connecting the center of the hoist drum at the end of each main beam to the center of the guide clearing wheel relative to the center of the main beam The line forms a small yaw angle, so that the wire ropes are staggered along the upper space of the main beam, and then the guide wheel is wound from the small hole into the main beam and wound onto the fixed and movable pulley blocks to solve the above problem; the technical means adopted by the present invention are as follows - The utility model relates to a space anti-interference arrangement for a plurality of lifting point crane hoisting wire ropes, comprising a main beam, a movable pulley block, a fixed pulley block and a hoisting machine, wherein the upper space of the upper beam upper cover plate is provided with a guiding pulley, and the cover plates at both ends are provided with a hoisting machine support To fix the hoist, the wire rope is in the effective part of the guiding pulley and the hoist Forming a steel rope footprint, which can be characterized by two triangles AABC and A'B'C' with the leading pulley as the apex angle, characterized in that the two triangles are symmetrically and oppositely arranged along the boundary line Ι-Γ , dividing line Ι-Γ with the center line of the main beam forming a small yaw angle, the two ends of the upper beam of the main beam are provided with two or more sets of hoisting machines; the heights of the hoisting machines are different, and each guiding The installation height and position of the pulleys are also different from the heights of the hoisting machines, and the formed steel rope occupying surfaces are not in the same plane; the vertical center line of the windings of the hoisting machines at both ends and the center line of the guiding pulleys are connected A small declination angle α is also formed with the center line of the main beam, and the hoisting machines on the same end are in the same direction as the eccentric angle generated by the main beam, and the hoisting machine at both ends of the main beam is opposite to the eccentric angle formed by the main beam; The wire rope is inserted into the main beam inner pulley block from the upper rope exit/inlet hole of the main beam upper cover plate along the upper space of the main beam cover plate via a fixed guide pulley, and then wound onto the movable pulley block, between the movable pulley and the fixed pulley anti- Wound, and finally fixed to the main beam on a given side of the fixed end of the pulley block.

The range of the small declination and the small declination α is:

When L>a/2, 0. < <90 ° , α ζ, where: L is the length of the reel, a is the width of the upper cover of the main beam, b is the length of the upper cover of the main beam, and ζ is the angle of the rope of the hoist.

The optimal solution is that the dividing line ι-ι' is parallel with the line connecting the vertical center line of the hoisting machine at both ends and the center line of the guiding pulley, and the small yaw angle α is equal to the hoist at each end of the small yaw angle and The guide pulleys are arranged symmetrically.

The movable pulley blocks in each of the hoisting systems composed of the hoists are connected by a connecting rod.

The hoist support on the cover plates at both ends of the main beam is arranged in a stepped manner, and the installation height of each guide pulley corresponds to the height of each hoist support.

Due to the adoption of the above technical solution, the multi-point lifting crane hoisting wire rope space anti-interference arrangement provided by the present invention is realized by a simple structure, and the space anti-interference arrangement scheme of the wire rope system of the hoisting mechanism composed of multiple sets of hoisting systems It is suitable for large lifting height and large span multi-hanging cranes with narrow composite main girder, so that the crane has the following worries when lifting large lifting structures such as drilling platforms:

1. It can make the lifting crane lifting mechanism work safe and reliable;

2. The mechanism is simple to arrange, easy to manufacture, install and maintain;

3. The hoisting mechanism consisting of multiple sets of hoisting systems is highly efficient;

4, light weight, can adapt to the main beam of small width, thus reducing the overall cost of the crane. DRAWINGS

Figure 1 is a schematic structural view of the present invention;

Figure 2 is a front view of the present invention;

Figure 3 is a plan view of the main beam of the present invention;

Figure 4 is a schematic view showing the winding structure of the steel wire rope of the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a drawing of the abstract of the present invention.

In the figure: 1, winch, 2, guide pulley, 3, moving pulley group, 4, connecting rod, 5, fixed pulley group, 6, wire rope, 7, hoist support, 8, single rope out / hole, 9, fixed end , 10, main beam, 11, upper cover.

detailed description

As shown in Figure 1 to Figure 4, the multi-hanger crane hoisting wire rope space anti-interference arrangement is used in multi-hanging cranes for overweight structures such as hanging drilling platforms. The crane is usually used for lifting large loads, the main beam height is large, and the width between the main girder webs is small, usually composed of multiple sets of hoisting systems, each hoisting system includes a hoist 1, a guide pulley 2 The movable pulley block 3, the moving pulley group connecting rod 4, the fixed pulley group 5, the wire rope 6, the hoisting machine support 7 and the like, usually each set of hoisting system comprises 4 moving pulley sets, and each moving pulley group controls one hanging point below. The winch 1 includes a reel (including a wire rope press plate), a speed reducer, a brake, an open gear, a coupling, a floating shaft, and the like, that is, a complete drive mechanism from a coupling connected to the motor to a final stage brake. Wherein the wire rope 6 forms a steel wire occupation area between the guide pulley 2 and the effective portion of the hoisting machine 1, and the area can be characterized by two triangles AABC and AA' B' C' which are the angled top of the guide pulley 2, as shown in FIG. When L>a/2, (L is the length of the reel, a is the width of the main girder cover, b is the length of the main girder cover, ζ is the hoist angle of the hoist), that is, when the two triangles are placed When the apex A and A' collide, the interference problem must be generated. Solving this problem with the traditional mechanical structure cannot solve this problem in the large-tonnage crane; therefore, the present invention aligns the two triangles symmetrically and oppositely along the boundary line. The boundary line I- forms a small declination angle with the center line of the main beam. The range of the small declination is: 0° < e <90°.

The hoisting machine 1 is placed on the cover plate of the main beam 10, and two or more sets of hoisting machines are arranged on the upper cover plates of each main beam; the wire ropes 6 of each hoisting machine are passed along a fixed guiding pulley 2 in the upper space of the main beam cover plate. The single rope exit/inlet hole 8 on the upper beam upper cover enters the main beam inner pulley block 5, and then is wound onto the movable pulley block 3, and is repeatedly wound between the movable pulley and the fixed pulley as shown in Fig. 4, and finally fixed at the main The beam is fixed on the fixed end 9 of the pulley side. Wherein each set of hoisting machines on both ends of the main beam adopts hoisting machines 7 of different heights, so that the hoisting heights of the different hoisting reel wire ropes 6 are different, and the formed steel rope occupying faces are not in the same plane; The hoist support 7 on the plate is distributed in a stepped manner, and the mounting height of each of the guide pulleys 2 corresponds to the height of each of the hoisting supports 7 as shown in FIG. Further, the line connecting the vertical center line of the reel 1 at both ends and the center line of the guide pulley 2 and the center line of the main beam 10 also form a small off angle α, and the range of the small off angle α is ι ζ, wherein The range of the hoisting angle of the hoist is less than or equal to 2.

And the boundary line I-1' is parallel with the line connecting the vertical center line of the hoist 1 at both ends and the center line of the guide pulley 2, and the small yaw angle α is equal to the hoist and the guide pulley at both ends of the small yaw angle Symmetrically arranged, the hoisting machines 1 on the same end are in the same direction as the eccentric angle generated by the main beam 10; this arrangement enables the wire ropes 6 to be staggered in space, avoiding interference between the wire ropes and the wire ropes and the main beams, and The hoisting drum and the yaw angle of the pulley meet the standard. Further, the movable sheave group 3 in each of the hoisting systems composed of the hoists 1 is connected by the link 4.

Here, the 6 sets of hoisting system with the main beam are arranged as an example: 6 sets of hoisting machine 1 are arranged on the main beam 10, in order to ensure that the yaw angle of the wire rope on the reel and the pulley does not exceed the standard, 3 sets of each end are finally adopted. The hoisting machine 1, wherein the length b of the upper cover of the main beam is 130 meters, the width a of the upper cover is 4 meters, and the deflection angle of the hoisting mechanism is less than or equal to 2 degrees. According to the previous empirical formula, the value of ^ is 1. 04度。 At the same time, the center line of the hoisting machine 1 and the center line of the guide pulley 2 and the center line of the main beam 10 also form a small yaw angle α is also 1. 04 degrees, so that Symmetrical parallel.

The hoisting machine 1 adopts the supports 7 of different heights to form the wire ropes in a staggered arrangement, and the movable pulley blocks 3 in the hoisting systems composed of the hoisting machines 1 are connected by the connecting rods 4, so that the moving pulley blocks 3 in the hoisting system Maintaining a fixed distance; avoiding the interference problem between the upper wire ropes of the beam, and at the same time, due to the arrangement, the spatial position between the guide wheel 2 and the fixed pulley block 5 is changed, which is easy to ensure that the wire rope and the pulley yaw angle in the main beam meet the requirements, and can be avoided. The mutual interference between the wires. The wire rope winding of the single-winding system is that the wire rope 6 is taken out from the hoisting machine 1 through the guiding pulley 2 to the fixed pulley group 5, and then to the movable pulley group 3, which is repeatedly wound between the moving pulley and the fixed pulley, and finally fixed on the fixed pulley side of the main beam. On the end 9, no matter how the lifting point moves during use, there will be no mutual interference between the wires.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention Equivalent substitutions or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims

Rights request

1. A space anti-interference arrangement for a multi-hanging crane hoisting wire rope, comprising a main beam (10), a movable pulley block (3), a fixed pulley block (5) and a winch (1), an upper part of the upper cover of the main beam (10) The space is equipped with a guiding pulley (2), and the cover plates at both ends are provided with a hoisting machine support (7) for fixing the hoisting machine (1), and the wire rope (6) is effective in the guiding pulley (2) and the hoisting machine (1) A steel rope footprint is formed between the portions, which can be characterized by two triangles AABC and AA'B'C' with the leading pulley (2) as the apex angle, characterized in that the two triangles are symmetric along the boundary line and Opposite arrangement, boundary line I- Γ with the main beam center line constitutes a small yaw angle. The main beam (10) has two or more sets of hoisting machines (1) at both ends of the upper cover plate; The height of the seat (7) is different, and the installation height and position of each guide pulley (2) are different from the heights of the hoisting supports (7), and the formed steel rope occupying faces are not in the same plane; Vertical centerline of the reel of each set of hoist (1) and guide pulley (2) The line connecting the center line and the center line of the main beam (10) also form a small declination angle α. The hoisting machines (1) on the same end are in the same direction as the eccentric angle generated by the main beam (10), and the main beam is two. The hoisting machine of the end is opposite to the eccentric angle formed by the main beam; the wire rope (6) of the hoisting machine (1) is along the upper space of the cover plate of the main beam (10) via a fixed guiding pulley (2) from the upper cover of the main beam The rope exit/inlet hole (8) enters the main beam inner pulley block (5), and then is wound onto the movable pulley block (3), and is repeatedly wound between the movable pulley and the fixed pulley, and finally fixed on the fixed end of the side of the main pulley on the fixed pulley block (9) )on.

2. The multi-point lifting crane hoisting wire rope space anti-interference arrangement according to claim 1, wherein the range of the small yaw angle S and the small yaw angle α is:

When L>a/2, 0° < <90. , α ζ, where: L is the length of the reel, a is the width of the upper cover of the main beam, b is the length of the upper cover of the main beam, and ζ is the angle of the rope of the hoist.

3. The space anti-interference arrangement of the multi-hanging crane hoisting wire rope according to claim 1 or 2, characterized in that the optimal solution is the dividing line I-1' with the reel of the hoist (1) at both ends The vertical center line is parallel to the line connecting the center line of the guide pulley (2), and the small yaw angle α is equal to the symmetrical arrangement of the hoist and the guide pulley at both ends of the small yaw angle.

4. The space anti-interference arrangement of the hoisting wire rope of the multi-lifting crane according to claim 1, The movable pulley block (3) in each of the hoisting systems composed of the respective hoists (1) is connected by a connecting rod (4).

5. The space anti-interference arrangement of the hoisting wire rope of the multi-hanging crane according to claim 1, characterized in that the hoisting machine support (7) on the cover plates at both ends of the main beam (10) is arranged in a stepped manner, and each guiding pulley The mounting height of (2) corresponds to the height of each hoist support (7).